MDOT Executive Leadership 

photo of Samantha Biddle

Samantha Biddle

Deputy Secretary

Deputy Secretary of Transportation Samantha Biddle has served the transportation industry for more than 17 years in both the public and private sector. Her extensive experience includes eight years in the private sector as a transportation planner before joining the State Highway Administration for six years in various planning, strategic and leadership roles. Prior to being named Deputy Secretary by Secretary Paul Wiedefeld, Samantha spent the past three years in executive positions within The Secretary’s Office. She is a graduate of the University of Delaware and is an American Institute Certified Planner (AICP).

portrait photo of Tony Bridges

Tony Bridges

Assistant Secretary for Transportation Equity and Engagement

Tony joins MDOT after serving as Executive Director for Blue Water Baltimore. He also is a former member of the Maryland General Assembly where he represented the 41st legislative district in Baltimore City and served on the Appropriations Committee, the Environment and Transportation Committee and the Chesapeake Bay Commission. His prior state government positions include Chief of Staff for the Maryland Transit Administration, Senior Advisor for MDOT, and Director of Community Outreach for the Governor’s Office of Community Initiatives before also becoming its Chief of Staff. Tony holds a bachelor’s degree in mass communications from Frostburg State University and a Certificate in Strategic Public Relations and Integrated Communications from Towson University.

portrait photo of Jawauna Greene

Jawauna Greene

Assistant Secretary for Public Affairs and Strategy

With a transportation career spanning more than 20 years, Jawauna has held numerous public sector roles. She formerly worked at the Maryland Port Administration as a legislative liaison and then the Maryland Transit Administration as the Director of Communications and Marketing. After leaving MDOT, Jawauna served as the Director of Advertising and Marketing at the Washington Metropolitan Area Transit Authority (WMATA). Prior to joining MDOT, she was the Director of Branding and Customer Partnerships for the Port Authority of New York and New Jersey. Jawauna has a bachelor’s degree in political science from Hood College and a master’s degree in business administration from the University of Maryland.

Jaclyn Hartman

Assistant Secretary for Transportation Investments

Most recently serving as MDOT’s Chief Financial Officer and Director of the Office of Public-Private Partnerships, Secretary Wiedefeld named Jaclyn as the new Assistant Secretary for Transportation Investments. Jaclyn has extensive knowledge in these areas as well as the ability to develop creative solutions to solve fiscal issues. Prior to joining MDOT, Jaclyn worked for the Maryland Transportation Authority and the Department of Legislative Services. During her career, she has worked on both the legislative and executive branch sides of Maryland’s P3 projects and served as committee staff for the Joint Legislative and Executive Commission on Oversight of Public-Private Partnerships, which created Maryland’s statutory framework for P3s. Jaclyn has a bachelor’s degree in political science from Elon University and a master’s degree in public policy from the University of Maryland.

portrait photo of Joe McAndrew

Joe McAndrew

Assistant Secretary for Project Development and Delivery

Joe joins MDOT after serving as Vice President of Government Affairs and Infrastructure for the Greater Washington Partnership. In this role, he led the Partnership’s policy and engagement work with federal, state and local elected officials, and led efforts to achieve a 21st century regional mobility and infrastructure ecosystem in the Capital Region. Prior to joining the Partnership, Joe served as legislative assistant for the Senate Commerce Committee and Senator Brian Schatz. Before working on Capitol Hill, he served as the Policy Director for Transportation for America. Joe holds a bachelor’s degree in management from Luther College and a master’s degree in community and regional planning from the University of Oregon.

portrait photo of Dianna Rosborough

Dianna Rosborough

Assistant Secretary for Administration

Prior to joining MDOT, Dianna served as Executive Vice President of Internal Business Operations (IBOP) for the Washington Metropolitan Area Transit Authority (WMATA). She also held positions as Vice President of IBOP Administration and Operations, Acting Vice President and Chief Labor Relations Officer, and Director of Labor Relations. Prior to joining WMATA, Dianna was Regional Vice President of Marketing for Anthem Healthcare and Company Founder of Rosborough Communications, Inc. Her experience in state government includes serving as Deputy Administrator of the Maryland Transit Administration, the Governor's Press Secretary and Director of Communications for the Maryland Transit Administration.